The Raven Does Not Choose Its Master

Yamauchi - a fantastic world where the Yatagarasu, a race of three-legged crows with the ability to transform into humans, live. Yukiya, a young Yatagarasu, is appointed as the personal attendant of the eccentric Crown Prince Wakamiya. Soon, he is entangled in a web of conspiracies attempting to overthrow the heir to the Imperial throne. (Source: Kodansha, translated) *Note: Includes four extra chapters.*